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Lamejs Alternatives
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lamejs reviews and mentions
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Having trouble understanding Int32Array , Int8Array etc;
const channels = [ new Float32Array(441), new Float32Array(441), ]; for (let i = 0, j = 0, n = 1; i < int16.length; i++) { const int = int16[i]; // If the high bit is on, then it is a negative number, and actually counts backwards. const float = int >= 0x8000 ? -(0x10000 - int) / 0x8000 : int / 0x7fff; // Deinterleave channels[(n = ++n % 2)][!n ? j++ : j - 1] = float; } // https://github.com/zhuker/lamejs/commit/e18447fefc4b581e33a89bd6a51a4fbf1b3e1660 const left = channels.shift(); const right = channels.shift(); let leftChannel, rightChannel; if (this.mimeType.includes('mp3')) { const sampleBlockSize = 441; leftChannel = new Int32Array(left.length); rightChannel = new Int32Array(right.length); for (let i = 0; i < left.length; i++) { leftChannel[i] = left[i] < 0 ? left[i] * 32768 : left[i] * 32767; rightChannel[i] = right[i] < 0 ? right[i] * 32768 : right[i] * 32767; } }
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Need help with ytdl-core and ExpressJS
`` async importEncoder() { if (this.mimeType.includes('mp3')) { const { lamejs } = await import(${this.src.origin}/lame.min.js`); this.mp3encoder = new lamejs.Mp3Encoder(2, 44100, 256); this.mp3controller = void 0; return this.mp3stream = new ReadableStream({ start: (_) => { return (this.mp3controller = _); }, }); } // ... } // ... write: async ({ timestamp }) => { const int8 = new Int8Array(441 * 4); const { value, done } = await this.inputReader.read(); if (!done) { int8.set(new Int8Array(value)); } else { console.log({ done }); return this.audioWriter.closed; } const int16 = new Int16Array(int8.buffer); // https://stackoverflow.com/a/35248852 const channels = [ new Float32Array(441), new Float32Array(441), ]; for (let i = 0, j = 0, n = 1; i < int16.length; i++) { const int = int16[i]; // If the high bit is on, then it is a negative number, and actually counts backwards. const float = int >= 0x8000 ? -(0x10000 - int) / 0x8000 : int / 0x7fff; // Deinterleave channels[(n = ++n % 2)][!n ? j++ : j - 1] = float; } // https://github.com/zhuker/lamejs/commit/e18447fefc4b581e33a89bd6a51a4fbf1b3e1660 const left = channels.shift(); const right = channels.shift(); let leftChannel, rightChannel; if (this.mimeType.includes('mp3')) { const sampleBlockSize = 441; leftChannel = new Int32Array(left.length); rightChannel = new Int32Array(right.length); for (let i = 0; i < left.length; i++) { leftChannel[i] = left[i] < 0 ? left[i] * 32768 : left[i] * 32767; rightChannel[i] = right[i] < 0 ? right[i] * 32768 : right[i] * 32767; } } // ... if (this.mimeType.includes('mp3')) { // Finish writing MP3 const mp3buf = this.mp3encoder.flush(); if (mp3buf.length > 0) { this.mp3controller.enqueue(new Uint8Array(mp3buf)); this.mp3controller.close(); } this.resolve(new Response(this.mp3stream).arrayBuffer()); }
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Who uses node executable without using npm?
Read this https://github.com/zhuker/lamejs/blob/master/LICENSE.
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BeReadable - Online Multilingual Audio Transcription and Recorder
Lamejs
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Is it possible to load multiple files and export them as one mp3 file (ToneJS)
Hi, yes, and you don't even need to bring the whole Tone.js lib for that but if you are using it anyway then Tone.Offline is the right thing for this, you get the audiobuffer as output which can be converted to .wav blob. As for .mp3 https://github.com/zhuker/lamejs or any other Lame implementation is worth looking at.
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A note from our sponsor - WorkOS
workos.com | 28 Apr 2024
Stats
zhuker/lamejs is an open source project licensed under GNU General Public License v3.0 or later which is an OSI approved license.
The primary programming language of lamejs is JavaScript.
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